Jam-freeing slider



Aug. 23,1960 L. H. MORIN 2,949,653

JAM-FREEZING SLIDER Filed June 10, 1954 5 Sheets-Sheet 1 INVENTOR Lows H. MORIN BY 9% ATTORNE Filed June 10, 1954 1.. H. MORIN 2,949,653 JAM-FREEING SLIDER Aug. 23, 1960 5 Sheets-Sheet 2 INVENTOR LOUIS H. MORIN ATTORNE 3, 1 LR MORIN 2,949,653

JAM-FREEZING SLIDER Filed June 10, 1954 s Sheets-Sheet s j F s/ w I Hm INVENTO LOUlS H. (1

BY: ATTORNE 9 L. H. MORIN 2,949,653

JAM-FREEING SLIDER Filed Jung 10, 1954 5 Sheets-Sheet 4 INVENTOR LOUIS H. MORIN Aug. 23, 1960 L. H. MORIN 2,949,653

JAM-FREEING SLIDER Filed June 10, 1954 5 Sheets-Sheet 5 INVENTOR LOUIS H. MORIN ATTORN EY United States JAM-FREEING SLIDER Louis H. Morin, 888 Grand Concourse, Bronx, NY. Filed June 10, 19-54, Ser. No. 435,694 '21 Claims. (Cl. 24-20515) This invention relates to sliders separable fastener stringers, that is, in coupling and uncoupling the same, and particularly to sliders having a separate bottom or back wall which is held in slideroperating position by a slide member or button. More particularly, the invention relates to sliders which for the most part are of the jam-freeing or snag-releasing type wherein the back wall is movable away from the top wall to facilitate freeing the slider in the event of jamming, and wherein the slide member or button is movable to control the movement of the back wall to its jam-freeing position or to its normal slider-operating position. Some of the sliders to which the. invention relates are capable of being mounted on a pair of stringers in the field, that is, in a repair shop, and other sliders may be removed in the field as well as installed.

The novel features of the invention will be best underfor use in operating stood from the following description, when taken together with the accompanying drawing, in which certain embodiments of the invention are disclosed and, in which, the separate parts are designated by suitable reference characters in each of the views and, in which:

Fig. 1 is a bottom plan view of a slider made according to my invention.

Fig. 2 is a section on the broken line 22 of Fig. 1 showing the back wall in its open or jam-freeing position.

Fig. 3 is a view, similar to Fig. 2, showing the parts in a different position and illustrating the back wall in its normal operative position.

Fig. 4 is a section, substantially on the line 4-4 of Fig. 3.

Fig. 5 is a section on the line 5-5 of Fig. 3 showing the bottom wall in elevation andomitting the button.

Fig. 6 is a reduced perspective View of the button which I employ detached.

Fig. 7 is a bottom plan view of a modified form of slider, with part of the construction broken away and in section.

Fig. 8 is a partial section on the line 8-8 of Fig. 7. Fig. 9 is a perspective view of a part of the slider shown Figs. 7 and 8 prior to assemblage to the slider parts. vFig. 10 is a section substantially on the line 10--10 of Fig. 7 showing a modification.

Fig. 1 1 is a view generally similar to Fig. 3 showing a modified form of construction.

Fig. 12 is a partial view, similar to Fig. 11, showing another form of construction.

Fig. 13 is a view, similar to Fig. 11, showing the button in section and showing another modification.

Fig. 14 is a perspective view of part of the lower portion of the slider showing the modification in Fig. 13; and

Fig. 15 is a perspective view other form of construction.

The present application forms a continuation-in-part of my prior application, filed January 11, 1954, Serial Number 403,199, now Patent No. 2,811,764.

of a slider showing ansurfaces 26, 27

Considering Fig. 4 of the drawing, I have shown in cross-section a slider for separable fastener stringers, in which 10 represents the normal top wall of the slider, having means partially indicated at 11 for attachment of -a fingerpiece or pull therewith, the latter not being shown, 'as it forms no part of the present invention. The sides of the wall 10 have inwardly extending flanges 12 which, in conjunction with the integral web portion 13, define part of the channel 14 of the slider body. The remainder of the channel is defined by a movable bottom or back Wall 15, also having inwardly directed side flanges 16.

The web 13 includes an integral bar portion 17 arranged centrally of the slider and extending forwardly in the direction of the contracted end of the slider. This bar portion includes spaced integral rivet pins 18 and 19 for retaining a plate 20 having slight spring properties on the lower surface of the bar portion 17. It will be clearly noted, from a consideration of Figs. 1 and 4 of the drawing, that the side edges of the plate 20 protrude beyond the sides of the bar to form elongated bearing portions 21, for purposes later described.

The bottom wall 15 has an elongated aperture 22 therein for reception of the bar 17. At opposed sides of the aperture are two elongated recesses 23, note Fig. 5 of the drawing, which recesses extend, at their ends, into curved recesses 24, the latter recesses, in combination with part of the recesses 23, forming a recess for reception of the plate 20, as is clearly noted in Fig. 1. Disposed at opposite sides of each of the recessed portions 24 are stop lugs 25 which, by engagement with plate Zll, check outward movement of the wall 15. Note Fig. 2. Inward or reverse movement of wall 15 is checked by engagement of the wall, at its wide end, with web 13. Note Fig. 3.

The wall 15 has spaced apertures 26 and 27' which open into the aperture 22, as noted in Fig. 5. Each of the apertures 26, 27 are partially defined by bevelled wall portions or cam surfaces 26', 27' which facilitate movement of a manually operated button 28 from the posi tion shown in Fig. 2 to the position shown in Fig. 3. In other words, in moving the button from the wide to the contracted end of the slider, the rounded end lugs 29, at each side of the button, ride up over the bevelled and thus move the wall 15 from its inoperative position of Fig. 2 to the operative position of Fig. 3; that is to say, in Fig. 2 the slider has its walls too far apart to operate the stringers, whereas in Fig. 3 the walls are normally spaced apart. As will be apparent, however, in Fig. 2 the wall 15 is released to enable the slider to be freed from a jam, such as is created by the introduction of foreign material or fabric between the slider and the stringers.

It will be noted, from a consideration of Figs. 4 and 6, that the button has a channel or longitudinal passage 30 to clear the bar 17, and the side walls of the button have longitudinal grooves 31, which open into the channel 30, to receive the side bearing portions 21 of the plate 28.

The button 28 preferably has a slightly raised roughened surface 32 to facilitate sliding movement thereof. It will be apparent, from a consideration of Fig. 4 of the drawing, that the rounded lugs 29 are substantially equal in dimensions to the width of the recesses 23, or the wall portions 33 of the wall 15 which are disposed between and adjacent the apertures 26 and 27.

It will also be apparent, from a consideration of Figs. 1 and 6 of the drawing, that end portions of the button 28 are recessed, as seen at 34, to clear the heads of the rivet pins 18 and 19 in the movement of the button due to the spring qualities of the plate which tends to be biased inwardly toward the slider, so as to provide a friction fit, thus holding the bottom against accidental movement. It will also be understood, when the back wall 15, which may be referred to as a back plane, is released in a jamming situation that the same does not permit accidental removal of the slider from the stringers.

In Figs. 7, 8 and 9, I have shown a modified form of slider, wherein a back Wall or back plane 35 is employed, generally similar to the wall 15. At 36, in Figs. 8 and 9 of the drawing, 1 have shown the web of the slider wall 37, which is shown in part in Fig.- 9 of the drawing, the web 36 having the extending integral bar 38, generally similar to the bar 17. The bar 38 has spaced rivet pins 39 for mounting of a plate 40 thereon, the plate 41) being generally similar to the plate 20 and is modified to the extent of having, between the rivet pins 39, an elongated aperture 41. The aperture 41 is disposed over a deep recess or chamber 42 formed in the bar and opening through the surface of the bar, the recess being adapted to receive a coil spring 43, as clearly noted in Fig. 8 of the drawing.

At 44 is shown a button, generally similar in contour to the button 28, and modified to the extent of having an extending lug or finger 45 which operates in the aperture 41 of the plate 40 and extends into the recess 42 and bears against one end of the spring 43. One end of the recess 42 is notched, as seen at 46, to receive the lug 45 and this notch forms shoulders 47, against which the spring 43 seats, as indicated in Fig. 7 of the drawing.

The spring 43 normally supports the button 44 in position supporting the back wall 35 in operative position. In other words, the rounded lugs 48 are out of engagement with the apertures 49 in the recessed sides 50 of the back wall 35. By moving the button 44 against the action of the spring 43, the rounded lugs 48 can be moved into position entering the apertures 49, thus allowing the back wall 35 to move into its jam-freeing position, as with the structure shown in the earlier figures. Considering Figs. 8 and 9 of the drawing, it will be apparent that the bar 38 has a projecting tongue 38' which enters a recess 35' in the bottom wall 35. This construction provides a support for the wall 35 at the contracted end of the slider, as will be apparent.

In Fig. of the drawing, I have shown a slight modification of the structure shown in Figs. 7 to 9, inclusive, and in Fig. 10, 35" represents a back wall, similar to the wall 35; 40' a plate, similar to the plate 40; 41- a recess in the bar 38", similar to the recess 41; 44' a button, similar to the button 44; 45' the projecting lug or finger, similar to the lug or finger 45; and 48' the rounded lugs on the button 44', similar to the lugs 48.

The sole difference in the structure shown in Fig. 10 is in providing the projecting side wall portions 51, so as to substantially house or shield the button 44 within deeper recessed sides 50. With the structure, as seen in Figs. 7 to 9, inclusive, the button 44 protrudes beyond the side surfaces of the back wall 35.

In Fig. 11 the back wall 52 of the slider is provided with spaced apertures 53 having bevelled or cam surfaces 54, as in the preceding modifications. The back wall also has rounded recesses 55 for reception of the spaced rounded lugs 56 of a button 57, similar to the button 28, although lugs 56 are longer than the corresponding lugs 29 or 48, 43 of Figs. 1-6 or 7-10. This construction provides means for releasably locking the button in such position as to hold the back wall in operative position. When the button is released, that is, moved so that lugs 56 slide out of recesses 55 and engage openings 53, the back wall is movable away from the top wall a greater distance than in the preceding modifications as no stop lugs are provided such as lugs 25. The back wall may thus be separated from the top wall sufficiently to permit the slider to be laterally removed the pin 72 in releasing the wall 63 from the stringers, and conversely, the slider may also be laterally installed on the stringers.

In Fig. 12, 52 represents a back wall, similar to the wall 52, but instead of the rounded recesses it has angular recesses 58 each defined by a stop wall 58 perpendicular to back wall 52' and by an inclined approach wall 58". A button 59 .is employed having tooth lugs 60 to engage the notches 58 in'retaining the button in operative position. When the button is in the released position, that is, when lugs 60 are engaged in openings 53', the back wall 52' is movable away from the top wall to such an extent as to enable the slider to be laterally installed or mounted on a pair of stringers, and in this respect the slider resembles that of Fig. 11. However, once it is mounted on the stringers, the slider of Fig. 12 is not removable as in Fig. l1, although it may be passed oil the ends of the stringers if not barred by the presence of end stops.

The slider of Figs. 13 and 14 is similar to that of Fig. 11 in being laterally removable and installable on the stringers. It is provided with a button 64 and long lugs 68 as in Fig. 11. However, the back wall 63 does not have recesses like 55. The retaining plate 62 is provided with aspring catch or finger 65 which projects sufiiciently to engage a recessed side 66 of the button 64 to retain the button in operative position, that is to say, with the back Wall 63 in its normal operative position. Whenever desired, the spring finger 65 can be forced in the direction of the arrow 67 to release the button 64 for movement along the plate 62 to allow the lugs 68 of the button to drop into the apertures 69 of the wall 63. It will be apparent, however, that, in the reverse movement of the button, the button will simply slide over the finger 65 and the finger will then snap into operative or holding position.

In Fig. 15 I have shown a slight modification of the structure shown in Fig. 13, wherein 63 represents a back wall, similar to the wall 63, 70 a retaining plate, generally similar to the plate 20, and held in position by rivet pins 71, 72 which are generally similar to the rivet pins 18 and 19, the difference being that the pin 72 is made sufiiciently long to secure a spring element 73 in position upon the plate 70, the element 73 having a leaf spring or finger 74 adapted to engage a recessed side 75 of a button 76, the button 76 being generally similar to the button 28, and being modified to the extent of having a longitudinal recess 77 in the bottom Wall thereof to clear a spring .finger 74. The element 73 also preferably has extending shoulders 78 for positioning of the element on the back wall 63' in the manner clearly illustrated. It will here be apparent that, by depressing the end 74 of the finger 74 sufiiciently to enter the recess 77, the button 76 can then be moved in the direction of for movement relatively to the companion wall of the slider. The remainder of the slider structure shown in Fig. 15 is generally similar to that shown in Figs. 13-14, inclusive, and for this reason, no further detailed description is deemed to be necessary.

Summarizing the invention, it will be seen that each slider modification comprises a top wall joined to a web having a bar extending therefrom. These parts are preferably integrally joined to one another. The bottom wall is separate and has an aperture for receiving the bar. A plate is disposed in the aperture and secured to the bar. The aperture merges into a pair of recesses on opposite sides thereof, each recess being defined by a side wall portion and a floor, and each floor having an opening in it, and preferably two. A member is mounted on the plate and has oppositely disposed projections which extend into the'recesses where they are engageable with the openings in the floors of the recesses to enable the bottom wall of the slider to move relatively to the top wall. By moving the member, the projections can be made to engage the .floors of .therecesses and thus move '5 and hold the bottom wall in a fixed position relatively to the top wall.

In all of the modifications, means are provided for holding the movable or slide member or button in a fixed position. In Figs. 1-6, the slide member has a friction type fit with plate 20 which, in conjunction with the biassing action of the spring-like plate 20, serves to hold the slide member against undesired movement. In the other modifications the holding means are more positive in action. In Figs. 7-10,.the slide member or button is held in a fixed position by the coil spring. When the slider is freed of a jam, the operator simply lets go of the button and the spring 43 acts to automatically move the button to its normal position, thus positively locking the back wall 35 into operative position for coupling and uncoupling the stringers. In Figs. 11 and 12 the lugs of the button engage cavities or recesses in the floors of the elongated recesses on either side of the elongated aperture in the bottom wall. In Figs. 13-15, the button is engaged by a spring-like part or strip associated with the plate. In all of the modifications except Fig. 12, the button is releasably held in locked position; in Fig. 12 the button is in a permanently locked position.

The sliders have various applications. Those shown in Figs. 1-6, 7-9, and 10 are particularly suitable for use as jam-freeing or snag-releasing sliders. In each, the bottom wall is movable away from the top wall to facilitate the release of the slider from engagement with a foreign object, but it will be noted that the movement of the wall is limited so as to prevent the slider from being laterally removed from the stringers, the limitation of movement being provided by the engagement of stops 25, 25' 'with plate 20, 40, 40', respectively. These sliders provide a positive release of the back wall, and when the slider has been freed from a jam, the back wall can be locked in position again to provide a rigid slider.

The sliders of Figs. 11-15 are specially suitable as repair sliders which are installable on stringers in the field, that is, in a repair shop in situations where the original slider has become lost or damaged. In Figs. 11-15 the back wall of the slider is movable away from the top wall to such an extent that the slider can be laterally mounted on a pair of stringers, after which the button is moved to position the back wall in fixed, slideroperating relation to the top wall. The sliders of Figs. 11, 13-14, and are further characterized by the fact that the back wall is movable away from its fixed position so that each of these sliders may function as a jamfreeing slider, and each of them may be laterally removed from the stringers if desired. In Fig. 12 the back wall may not be moved away from its fixed position without damaging the slider.

It may be pointed out that in Figs 1-10 the stops 25, 25' on the bottom wall may be dispensed with while still limiting the movement of the back wall to prevent the slider from being laterally removed from the string ers. This is possible by relying on the engagement (note Fig. 2) between surfaces 33a of wall portions 33 and surfaces 28a of button 28. An engagement of this type may also be employed in Figs. 11, 13-14, and 15, although, as noted, in these sliders the back wall is movable away from the top wall sutficiently to permit the slider to be laterally removed from the stringers; or if desired, stops such as stops 25 may be provided on the back walls of Figs. 11, 13-14, and 15 without affecting the lateral removability of the sliders, and on the other hand, the stops may be of such size as to render these particular sliders laterally non-removable.

Having fully described my invention, What I claim as new and desire to secure by Letters Patent is:

1. A jam-freeing slider for separable fastener stringers, comprising a slider body defined by channeled walls,

'one wall having an integral web at one end thereof,

said web having an extending bar arranged over and the plate and having parts extending into said recessed portions, said parts being engageable with said cam surfaces for controlling movement of the second wall.

2. A slider of the character described, comprising a pair of channelled walls defining a slider body, one wall having an integral web at one end, said web including a projecting bar portion arranged in spaced relation to said wall, the other wall being apertured to receive said bar portion, the bar portion having longitudinally spaced rivet pins, an elongated plate secured to the bar portion by said pins, said plate having sides projecting beyond the sides of the bar portion, a button mounted on the plate and movable between said rivet pins, side edges of the button having inturned flanges enveloping side edges of said plate in retaining the button against displacement therefrom, and side edges of said button and the second named wall of the slider having interengagin-g means controlling positioning of the second named wall with respect to said first named wall.

3. A slider of the character described, comprising top and bottom walls collectively defining the channel of a slider body, the top wall having an integral web at one end thereof, the web including an elongated integral bar spaced centrally and longitudinally with respect to the inner surface of said top wall, the bottom wall having an elongated aperture for receiving said bar and being movable thereon toward and from the top wall, and means slidably engaging and movable longitudinally of the bar and operatively engaging said bottom wall for controlling positioning of the bottom wall with respect to said top wall.

4. A jam-freeing slider for separable fastener stringers, comprising a slider body defined by channelled walls, one wall having an integral web at one end thereof, said web having an extending bar arranged over and spaced with respect to said wall, the other wall being movable toward and from the first wall, the second named wall having an elongated aperture receiving said bar, said second wall having recessed portions at opposed sides of the aperture, each recessed portion having spaced cam surfaces, a plate fixed to said bar and having sides extending into the'recessed portions of the second Wall, a member slidably engaging the sides of the plate and having parts operating in said recessed portions, said member having spaced lugs operatively engaging said cam surfaces in controlling movement of the second wall, and means operatively engaging said member for support of said member in position retaining said second wall in operative position.

5. A jam-freeing slider for separable fastener stringers, comprising a slider body defined by channelled walls, one wall having an integral web at one end thereof, said web having an extending bar arranged over and spaced with respect to said wall, the other Wall being movable toward and from the first wall, the second named wall having an elongated aperture receiving said bar, said second wall having recessed portions at opposed sides of the aperture, each recessed portion having spaced cam surfaces, a plate fixed to said bar and having sides extending into the recessed portions of the second wall, a member slidably engaging the sides of the plate and having parts operating in said recessed portions, said member having spaced lugs operatively engaging said cam surfaces in controlling movement of the support of said member in position retaining said sec- 7 nd wall in operative position, and said means comprising a coil spring housed in said bar.

6. A jam-freeing slider for separable fastener stringers, comprising a slider body defined by channelled Walls, one Wall having an integral web at one end thereof, said web having an extending bar arranged over and spaced with respect to said wall, the other wall being movable toward and from the first wall, the second named wall having an elongated aperture receiving said bar, said second wall having recessed portions at opposed sides of the aperture, each recessed portion having spaced cam surfaces, a plate fixed to said bar and having sides extending into the recessed portions of the second wall, a member slidably engaging the sides of the plate and having parts operating in said recessed portions, said member having spaced lugs operatively engaging said cam surfaces in controlling movement of the second wall, means operatively engaging said member for support of said member in position retaining said second wall in operative position, and said means comprising a yieldable finger.

7. A jam-freeing slider for separable fastener stringers, comprising a slider body defined by channeled walls, one wall having an integral web at one end thereof, said web having an extending bar arranged over and spaced with respect to said wall, the other wall being movable toward and from the first Wall, the second named wall having an elongated aperture receiving said bar, said second wall having recessed portions at opposed sides of the aperture, each recessed portion having spaced cam surfaces, a plate fixed to said bar and having sides extending into the recessed portions of the second wall, a member slidably engaging the sides of the plate and having parts operating in said recessed portions, said member having spaced lugs operatively engaging said cam surfaces in controlling movement of the second wall, means operatively engaging said member for support of said member in position retaining said second wall in operative position, and said means comprising a yieldable finger fashioned from the material of said plate.

8. A slider of the character described, comprising top and bottom walls collectively defining a channel of a slider body, the top wall having an integral Web at one end thereof, the web including an elongated bar spaced centrally and longitudinally with respect to the inner surface of said top wall, the bottom wall being movable on said bar toward and from the top wall, means checking movement of the bottom wall toward the top wall in control of definite spacing of said walls one with respect to the other, means slidably coupled with and movable longitudinally of said bar and opera-tively engaging the bottom wall for controlling and checking movement of the bottom wall in a direction away from said top wall, and means checking movement of the last named means in both directions longitudinally of said bar.

9. A slider of the character described, comprising top and bottom walls collectively defining a channel of a slider bdoy, the .top wall having an integral web at one end thereof, the web including an elongated bar spaced centrally and longitudinally with respect to the inner surface of said top wall, the bottom wall bein movable on said bar to- Ward and from the top wall, means checking movement of the bottom wall toward the top wall in control of definite spacing of said walls one with respect to the other, a member slidably coupled with said bar to move longitudinally thereof, and means on said member and bottom wall for retaining said member against movement relatively to the bottom wall when said bottom wall is supported in operative position by said member.

10. A slider for separable fastener stringers comprising a top wall integrally joined to a web, an elongated bar integrally joined to the web and extending from the bottom portion thereof, a separate bottom wall having an elongated aperture therein for receiving and movably mounting said bottom wall on the bar, an elongated plate of greater width than the bar disposed in said aperture and secured to the bar, said aperture merging into a pair of elongated recesses on opposite sides of the aperture, each said recess being defined by a floor having an opening therein, a member mounted on the plate and grooved 'to receive said bar, said member having oppositely disposed lugs which extend into said recesses and are engageable .with the openings in the floorsof said recesses to enable the bottom wall to move away from the top wall, interengageable means associated with said plate and bottom wall for checking movement of the bottom wall away from said top wall, and said member being movable to -enable said lugs to engage the floors of said recesses, thereby to move said bottom wall toward the top wall and to hold the bottom wall in a fixed position relatively to the top wall.

11. A slider for separable fastener stringers comprising a top wall joined to a web, a bar joined to the web and extending therefrom, a separate bottom wall having an aperture therein for receiving and movably mounting said bottom wall on the bar, a plate disposed in said aperture and secured to the bar, said aperture merging into a pair of recesses on opposite sides of the aperture, each said recess being defined by a floor having an opening therein, a member mounted on the plate having oppositely disposed projections which extend into said recesses, said projections being engageable with the openings in the floors of said recesses to enable the bottom wall to move relatively to the top wall, and said member being movable to enable said projections to engage the floors of said recesses to hold the bottom wall in a fixed position relatively to the top wall.

12. A slider for separable fastener stringers comprising a top wall integrally joined to a web, an elongated bar integrally joined to the web and extending from the bottom portion thereof, a separate bottom wall having an elongated aperture therein for receiving and movably mounting said bottom Wall on the bar, an elongated plate of greater width than the bar disposed in said aperture and secured to the bar, said aperture merging into a pair of elongated recesses on opposite sides of the aperture, each said recess being defined by a side wall portion and a floor, each said floor having an opening therein, a slide member slidably mounted on :the plate and disposed between said opposite side wall portions, said slide member having oppositely disposed lugs which extend into and are movable through said recesses, said lugs being engageable with the openings in the floors of said recesses to enable the bottom wall to move relatively to the top wall, said lugs upon movement of 'the slide member being engageable with the floors of said recesses to hold the bottom wall in a fixed position relatively to the top wall, and means for releasably locking the slide member in such a position as to hold the bottom wall in said fixed position relatively to the top wall.

13. A slider for separable fastener stringers comprising a top wall having a web, an elongated bar joined to the web and extending from the bottom portion thereof, a separate bottom Wall having an elongated aperture therein for receiving the bar and being movable along the bar away from and into a normal slider-operating position relatively to said top wall, an elongated plate of greater width than the bar disposed in said aperture and secured to the bar, said aperture having a wall portion on opposite sides thereof, each said wall portion having at least one opening therein, a slide member slidably mounted on the plate and movable therealong from a releasing position to a fixed position, said slide member having oppositely disposed projections which in the releasing position of the member extend into said openings and enable the bottom wall to move away from said normal slider-operating position, said projections, on movement of the member to said fixed position, serving to engage said wall portions and move the bottom wall into said normal slider-operating position.

14. A slider according to claim 13 having means for holding the slide member in the fixed position of the same.

15. A slider according to claim 14 in which said holding means are releasable.

16. A slider according to claim 15 in which said holding means comprises a frictional mounting of the slide member on the plate.

17. A slider according to claim 15 in which said holding means are spring-biasscd.

'18. A slider according to claim 14 in which said holding means xenon-releasable.

19. A slider according to claim 13 which, with said slide member in releasing position, has said bottom wall thereof movable away from said normal slider-operating position a distance suficient to enable the slider to be laterally installable on a pair of stringers.

20. A slider according to claim 13 which, with said slide member in releasing position, has said bottom wall thereof movable away from said normal slider-operating position a distance sufiicient to enable the slider to be laterally removable from a pair of stringers.

21. A slider for separable fastener stringers comprising a top wall integrally formed with a web, an elongated bar integrally joined to the web and extending from the bottom portion thereof, a separate bottom wall having an elongated aperture therein for receiving the bar, an elongated plate of greater width than the bar disposed in said aperture and secured to the bar, said aperture having a wall portion on opposite sides thereof, a slide member mounted on the plate and grooved to receive said bar, said slide member having lugs disposed on opposite sides thereof; and said lugs being engageable with said wall portions to hold the bottom wall in a fixed position relatively to the top wall.

References Cited in the file of this patent UNITED STATES PATENTS 2,181,625 Mucci Nov. 28, 1939 2,681,492 Lackritz June 22, 1954 2,686,947 Schuchardt Aug. 24, 1954- 

